| Autor: |
Weiwei Zhou, Qunyan Wang, Shuo Chen, Fei Chen, Haofeng Lv, Junliang Li, Qing Chen, Jianbin Zhou, Bin Liang |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Agricultural Water Management, Vol 293, Iss , Pp 108708- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1873-2283 |
| DOI: |
10.1016/j.agwat.2024.108708 |
| Popis: |
Soil pH is important for influencing soil properties. High input of nitrogen (N) fertilizers and irrigation water has accelerated the soil acidification in plastic-shed greenhouses. However, little is known about the dynamics of soil pH buffering system, especially the base cations, and its response mechanisms under different N management practices. In this study, we investigated the responses of soil Ca2+ and Mg2+ leaching loss to nitrate leaching under different N application rate, N forms, or straw addition. Our long-term experiment in typical greenhouses showed that N application significantly decreased soil pH and increased Ca2+ and Mg2+ leaching loss by 43.1–73.6%, which correlated significantly and positively with nitrate leaching loss. However, optimizing N application and straw incorporation alleviated the leaching loss of Ca2+ and Mg2+ not only by alleviating the accompanying nitrate leaching caused by reduced N input, but also by reducing the conversion of exchangeable Ca2+ and Mg2+ to water-soluble Ca2+ and Mg2+ caused by alleviating soil pH reduction. The laboratory microcosm experiment showed that nitrate application did not reduce soil pH, but significantly increased the leaching loss of Ca2+ and Mg2+. Ammonium sulfate application also significantly increased the leaching loss of Ca2+ and Mg2+, whereas the effects were significantly reversed by nitrification inhibitors. These results further supported the importance of nitrate leaching in promoting the Ca2+ and Mg2+ losses. Together, this study revealed new insights into the dynamics of cation losses mainly regulated by nitrate leaching loss, highlighting that optimizing N management is an effective strategy to alleviate base cation losses and subsequent soil acidification for sustainable agricultural management. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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